If your hair looked and felt good then at least that protein is fine. There are people with coarse hair who can use some proteins and people with fine hair who are protein sensitive. Ultimately it comes down to trial and error. You will know if your hair doesn't like a protein. Most people get a straw-like feeling to their hair if they use too much protein. Some people will end up with extremely soft and straight hair. No to heads are alike and a lot of what's said here is a guideline, but there are no hard and fast rules.